Abstract
In this paper, the small-signal model and stability-oriented consensus control scheme for inverter-based microgrid systems is proposed. By perturbating four identified dominant control parameters of inverter-based microgrid intentionally, the corresponding incremental matrix of microgrid system can be formed. Then, Matrix Perturbation Theory is employed in this paper to reduce the computational burden caused by repetitive calculations of system eigenvalues during stability analysis. Furthermore, the objective function is formulated based on the small-signal stability index and consensus index of microgrid system. Finally, the optimal control algorithm based on the joint application of Matrix Perturbation Theory and Artificial Fish Swarm Algorithm is introduced in this paper so that the stability and consensus rate of microgrid can be ensured. Besides, the effectiveness of proposed method can be verified in Matlab/Simulation results.
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